Your USB 3.0 drive feels like USB 1.1. A firmware update can sometimes reset the timing parameters to fix this.
If any of these sound familiar, you need a Phison PS2251-07 update (re-flash).
You plug in the drive. Windows makes the “ding-dong” sound. You open “This PC” – the drive appears, but capacity shows 0 bytes. Formatting fails. This is usually a corrupt FTL (Flash Translation Layer). phison ps225107ps2307 upd
MPALL uses unsigned drivers. Reboot your PC and press F7 during startup (or shift-click Restart → Troubleshoot → Advanced → Startup Settings → Disable driver signature enforcement).
| Issue | Likely Cause | Fix |
|-------|--------------|-----|
| MP tool doesn’t detect drive | Wrong driver installed | Use DriveCleanup.exe to remove old USB drivers. |
| "Device not support" error | Firmware file mismatch | Double-check FW version; try a different MP tool revision. |
| Drive becomes write-protected | Bad block management flag | Re-run with "Erase All Blocks" and "Preformat" enabled. |
| Slow speed after update | Flashed with USB 2.0-only firmware | Reflash with full USB 3.0 firmware (look for v3 in filename). | Your USB 3
The tool will:
Success indicator: The status column changes from "Empty" → "Flashing" → "Done" (green). You plug in the drive
The Phison PS2251-07 (often referenced interchangeably or as a variant of the PS2307 series) is a widely used USB 3.0/3.1 flash drive controller manufactured by Phison Electronics Corp. This report analyzes the "UPD" (Update) ecosystem surrounding this controller. Specifically, it addresses the necessity of firmware updates for performance restoration, the tools required for mass production (MP) programming, and the risks associated with the "fake capacity" market commonly linked to this specific chipset.
You don’t update a Phison controller for “new features.” You update to fix corruption or to perform a low-level format after the drive becomes bricked. Here are the classic symptoms that indicate you need a firmware re-flash: